One Clock
Last updated: 10 November 2026
Most populous countries with one time zone
This ranki.gg Rank it uses one measure: Population of countries with one time zone, in people, 2024. The countries on the card are India, China, Pakistan, Nigeria, Bangladesh, Ethiopia. You do not have to recall the numbers from memory. They sit in a column. The job is to match each country to the value that belongs to it, then lock the order in. Five tries. A card in the right spot locks. A card in the wrong spot turns red so you can move it.
India, at 1,450,935,791 people in 2024, is ahead of China at 1,408,975,000, and both keep a single legal time. China's row is UTC+8 because unofficial Xinjiang Time is not counted. Pakistan is third at 251,269,164. The United States is off this list: Wikipedia gives it 11 zones once Baker Island and Wake Island are included. Ethiopia, at 132,059,767, is larger than Japan and just misses this six.
The countries on the card
| # | Country | people |
|---|---|---|
| 1 | India | 1,450,935,791 |
| 2 | China | 1,408,975,000 |
| 3 | Pakistan | 251,269,164 |
| 4 | Nigeria | 232,679,478 |
| 5 | Bangladesh | 173,562,364 |
| 6 | Ethiopia | 132,059,767 |
India leads this table at 1,450,935,791 people. After that: China at 1,408,975,000 (41,960,791 people under India); Pakistan at 251,269,164 (1,157,705,836 people under China); Nigeria at 232,679,478 (18,589,686 people under Pakistan); Bangladesh at 173,562,364 (59,117,114 people under Nigeria); Ethiopia at 132,059,767 (41,502,597 people under Bangladesh). India is 10.987 times Ethiopia. That multiple is the top row divided by the bottom row of this same table. In the wider list of 172 stored on the puzzle, India is number 1, China is number 2, Pakistan is number 3, Nigeria is number 4, Bangladesh is number 5, Ethiopia is number 6.
The fact says India is ahead of China, and that both keep a single legal time. China's row is UTC+8 because unofficial Xinjiang Time is not counted. Pakistan is third. The United States is off this list because the same Wikipedia table gives it 11 zones once Baker Island and Wake Island are included. Ethiopia is described as larger than Japan and just missing this six. Nigeria and Bangladesh are the fourth and fifth names on the card. Population is the World Bank total for 2024. A country is included only when the Wikipedia time-zone table says 1.
The source line on the puzzle is: World Bank, Population, total (SP.POP.TOTL), 2024, via country_attributes.csv. Wikipedia, List of time zones by country. The number is the table's own count of standard UTC offsets. Dependent territories are included, Antarctic claims are not, and daylight saving is not an extra zone. Unofficial offsets count only when the table lists them, so Australia includes UTC+08:45 and China does not include Xinjiang Time. France is 12, not 13. A country is on this list only when that table says 1. The puzzle does not add a separate caveat beyond that source line and the fact above. ranki.gg does not invent a value that is missing from that source. If two countries were so close that the order would depend on rounding, they would not be the pair the card asks you to separate.
When you finish the puzzle, the answer screen repeats the order, the fact, and a link to the source. That link is the same URL cited here: https://en.wikipedia.org/wiki/List_of_time_zones_by_country.